Method of transmitting and receiving multicast data

Abstract

The present invention relates to a wireless mobile communication system, and more particularly, to a method of transmitting data to mobile terminals in the wireless mobile communication system capable of transmitting multicast data.In order to solve the aforementioned problems in the prior art, a method of transmitting data to mobile terminals in a mobile terminal communicating with a network through which multicast data are transmitted. The method of the present invention comprises the steps of transmitting a requesting frame to the network for requesting the multicast data when the start of a multicast service is recognized through an upper layer of the mobile terminal; receiving a response frame from the network in response to the request frame; and receiving the multicast data from the network.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a wireless mobile communication system, and more particularly, to a method of transmitting data to mobile terminals in the wireless mobile communication system capable of transmitting multicast data.[0003]2. Description of the Related Art[0004]The present invention is directed to a communication method applicable to a mobile communication system capable of transmitting multicast data. Hereinafter, a communication system using a wireless local area network (LAN) interface will be described as an example of the mobile communication system capable of transmitting multicast data.[0005]FIG. 1 is a view showing the structure of a frame used in a wireless LAN (IEEE 802.11).[0006]FIG. 2 is a view showing an example of a management frame used in a wireless LAN. As shown in the figure, an example of the management frame can be a beacon, a probe request, and a probe response.[0007]FIG. 3 is a view ...

AI Technical Summary

Benefits of technology

[0035]The present invention is conceived to solve the aforementioned problems in the prior art. Accordingly, an object of the present invention is to provide a method of managing a wireless network multicast group wherein wireless resources can be efficiently managed in a network capable of providing multicast services.

[0036]Another object of the present invention is to provide a method of managing a multicast group, by which an effect of saving power consumption can be maximized.

[0037]A further object of the present invention is to provide a method of managing a multicast group, by which wireless resources can be efficiently managed in consideration of handovers performed by a terminal.

Problems solved by technology

However, there are disadvantages in that the transmission speed is relatively low compared with a wired LAN, and signal quality is unstable and signal interference can occur due to characteristics of a wireless channel.

Due to the characteristics of the prior art, there is a certain limitation in maximizing the effect of saving electric power.

That is, there may be a problem in that all the terminals cannot receive the multicast service.

Due to the above characteristics, there is another problem in that wireless resources cannot be efficiently used.

Therefore, there is a further problem in that an AP cannot receive a sufficient amount of feedback information while freely transmitting data without regard to the number of terminals.

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